Improvement in insulators for telegraph-wires



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Insulator. l 110.109,161. Patented Nov. 22,1870.

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ASH/BEL GRATTAN SMITH ANI) \VILL'[AM PETTINGEL'L, OF PAINESYILLE, OHIO,AS- SYGNORS TO THEMSELVES AND WI'LLTAM H. FOWLER, OF SAME PLACE.

Letters Patent No. 109,461, dated November 22, 1870; antedated November11. 1870.

IMPROVEMENT lN INSULATORS FOR TELEGRAPH-WIRES.

Thel Schedule referred 'to in these Letters Patent and making part ofthe same.

divided horizontally, this tbrming a fr)Y und complete' insulator.

The second partot` our invention relates to the glass insulator, t'ormedot' two blocks ot' glass, divided horizontally. .I.he upper surfaeeofthe lower block is curved upward in the center, to tit into acorresponding curve on the lower side ot' the upper block. The blocks,when together, lit closely. The channel to receive the wire is cnt outot' the blocks: in the lower block, lengthwise .through the curve amlslightly rounding, following the form ofthe curve; in the upper block itis cut away only at the ends, so that, when the wire is placed betweenthe blocks, it is griped securely, and prevented t'rom drawing through;the ends of both upper and lower blocks are out out in a cone-shapedrecess, to allow l'or the sway ot' the wire; the outline ot' the blocksis oval, to suit the form ofthe recess in the box, thus holding theblocks lsecurely iu the box.

The third part ot' our invention relates to the top or cover, said topis secured to the box in any convenient manner; on the edge of the topare drips, to lead the water, which, it' the drips were not used, wouldi'ollow over the edge ot' the top, and pass into y*the box. betweentheglass and ease. .ln the winter, the water, freezing, would rupturethe glass; the drips, as is easily seen, attract the water, and by theirposition on the under side, and near the ends ot' the top, and clear ollthe box, prevent the water from passing into the. box. The cover can bemade of any convenient form.

The t'ourth part of our invention relates to the gasket, made of indiarubber, or any elastic material; said gasket is placed between the glassblocks and the bottom ot'the box, n'iaking' an elastic bed t'or the.blocks.

The following is a description ol` the accompanying drawiu g Figure .lis a perspective view ot' the .insulator complete in all 'its parts,:tud embodying our inven- Itioi'i.A

Figure ll, longitudinal section ot'tbe same.

Figure .'lli, perspe/ctive view ot' the curved glass insulating-blocks.

Figure 1V, view ofthe elastic gasket. Figure Y, section ofthe top,showing the drip.

A is a box, its interior ot' an oval forni, with the pin or screw llprojecting from its bottom, making an attachment to the pole, or anyother support.

lhe elastiegasket (l is first placed in the bottom ot' the box, servingas an elastic bed for the glass i11- sulating-blocks O and l) to reston, and confining, by itsspring, both blocks tirnily together.

'lhe lower curved glass block l) is cut out lengt-hwise, through thecurve. lil, to receive the Wire.

.lhe lower curved glass block l) is placed in position on the gasket (t,the upper block O is then placedt on .the block l), the curve l in saidblock titting over and receiring the curve on the block 1).

.lhe block (l is slight-ly grooved near its ends to receive the. wire.

When both blocks are in position, and pressed together, theyv securelygripe the wire between them, preventing it t'rom drawing` through.

.lhe ends ot' both blocks have a conc-shaped open. ing, to allow thewire to swayback or forth without breaking the glass.

'.lhe oval t'orm ot the blocks titting into the o 'al seat in the boxkeeps them iu their place; the top or cover is secured to the. box inany convenient mauner.

Said cover has the dripfpoints a. projecting t'roni its under surliice,Itwo on a side, near the ends ot' the top and clear of the box, the useof which, as easily seen, is to lead the water during rain, and cause itto drop clear ot' the box and wire; it' the drips @were not used, thewater would run under the top, and down between the box and the glassblocks, freezing in the winter, and destroying its pert'ect insulation.

.lhe advantage in this improvement is, it is not necessary t'or thewinkmeu to carry tools up the post to secure the wire to the insulator.

Where the glass cone. is used, the wire has to be wound round the cone,and then secured by a short piece ot' wire wound round the cone abovethe wire, and secured to the main wirel by twisting the ends round thewire, necessitating the use ot'a tool.

We are well awarethat wire has been secured to insulators withoutwinding, as by passing through hooks or otherwise.; most ot' them areexpensive and wet insulators.

,ln our improvement, the workman, in putting up the wire, securesthe'insulator to the postlbcfore raising it atter the pole is raised hecarries the wire up L). The. elastic gmskob H, Substantially :lshcl-einhouo sot forth.

1. 'Iho .ourhuzlou o1" ho orul hox A, cowl' J, with tho u'ulor-drpsul outh(l lowor edge of' the cover l, 1h@ curved glass blocks U aud l), undthe vluslc guskct :111 comhiucd nud used iu combination, :rs :lud iortho purposo :1s hcroiuhoforc .ser 'orth.

ASHBEL GR-A'LTAN SBHTH. \\'I LLL-UI ll'llbW-.l hh.

Wi mossos:

Joux J. Bhrcuum., Holmgu Amour).

